/**
 * Copyright (c) 2010, Casey Lai
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation and/or
 * other materials provided with the distribution.
 * 
 * Neither the name of the Cheetah Group nor the names of its contributors may be
 * used to endorse or promote products derived from this software without specific
 * prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 */

package org.cheetahworkflow.designer.part;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import org.cheetahworkflow.designer.model.Arrow;
import org.cheetahworkflow.designer.policy.ArrowEditPolicy;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.ManhattanConnectionRouter;
import org.eclipse.draw2d.PolygonDecoration;
import org.eclipse.draw2d.PolylineConnection;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.editparts.AbstractConnectionEditPart;
import org.eclipse.gef.editpolicies.ConnectionEndpointEditPolicy;
import org.eclipse.swt.SWT;


public class ArrowPart extends AbstractConnectionEditPart implements PropertyChangeListener {

	@Override
	protected IFigure createFigure() {
		PolylineConnection conn = new PolylineConnection();
        conn.setTargetDecoration(new PolygonDecoration());
        conn.setConnectionRouter(new ManhattanConnectionRouter());
        conn.setLineStyle(SWT.LINE_SOLID);
        return conn;
    }
	
	@Override
	protected void createEditPolicies() {
		installEditPolicy(EditPolicy.COMPONENT_ROLE, new ArrowEditPolicy());
        installEditPolicy(EditPolicy.CONNECTION_ENDPOINTS_ROLE, new ConnectionEndpointEditPolicy());
	}
	
	@Override
	public void propertyChange(PropertyChangeEvent event) {
		String propName = event.getPropertyName();
		if (Arrow.PROP_DEFAULT.equals(propName)) {
			resetLineStyle(event);
			refreshVisuals();
		}
	}
	
	@Override
	public void activate() {
        if (isActive()) {
            return;
        }
        super.activate();
        ((Arrow) getModel()).addPropertyChangeListener(this);
    }

	@Override
    public void deactivate() {
        if (!isActive()) {
            return;
        }
        super.deactivate();
        ((Arrow) getModel()).removePropertyChangeListener(this);
    }

	@Override
	public void setSelected(int value) {
        super.setSelected(value);
        PolylineConnection figure = (PolylineConnection) getFigure();
        figure.setLineWidth(value == EditPart.SELECTED_NONE ? 1 : 2);
    }
	
	public void resetLineStyle(PropertyChangeEvent event) {
		PolylineConnection figure = (PolylineConnection) getFigure();
		figure.setLineStyle(SWT.LINE_SOLID);
	}
}
